2020
DOI: 10.1103/physrevb.102.014445
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Controlling the propagation of dipole-exchange spin waves using local inhomogeneity of the anisotropy

Abstract: Spin waves are promising candidates to carry, transport and process information. Controlling the propagation characteristics of spin waves in magnetic materials is an essential ingredient for designing spin-wave based computing architectures. Here, we study the influence of surface inhomogeneities on the spin wave signals transmitted through thin films. We use micromagnetic simulations to study the spin-wave dynamics in an in-plane magnetized yttrium iron garnet thin film with thickness in the nanometre range … Show more

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Cited by 7 publications
(6 citation statements)
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References 52 publications
(74 reference statements)
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“…The long wavelength/negative phase velocity wave packet [Fig. 5(b)] partly tunnels through and partly is reflected from the field decrease, as reported earlier [36][37][38][39][40][41]. The tunneled part of the wave packet retains its pseudospin.…”
Section: E Magnon Valleytronicssupporting
confidence: 60%
See 2 more Smart Citations
“…The long wavelength/negative phase velocity wave packet [Fig. 5(b)] partly tunnels through and partly is reflected from the field decrease, as reported earlier [36][37][38][39][40][41]. The tunneled part of the wave packet retains its pseudospin.…”
Section: E Magnon Valleytronicssupporting
confidence: 60%
“…The dashed lines and points at their crossings show the correspondence between features from the different panels. See the Supplemental Material [33] for an animated version of this figure . FMR value by a smaller amount, a fraction of the wave packet tunnel through the bottom of the well [36][37][38][39][40][41] (not shown). Upon another backscattering from the same high-field turning point at P3, the wave packet propagates through the other U point (R3), and its wavelength continues to decrease (rather than to increase) as the magnetic field decreases.…”
Section: Symmetric Spin-wave Well: High-frequency Confinement and Möbius Modesmentioning
confidence: 96%
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“…Also, λ 1 and λ 2 waves are elliptical along x (ϵ = 0.8), whereas the λ 3 mode near the top surface is elliptical along z (ϵ = 0.3). Efficient transmission of spin waves across single interfaces for some of the mode conversions may be attributed to backscattering immunity, an effect that is prominent for DE spin waves inside the volume-mode gap 34,35 . We note that stronger spin-wave reflection at other interfaces does not contradict low-loss spin-wave transmission across nanoresonators at allowed frequencies (Figs.…”
Section: Resultsmentioning
confidence: 99%
“…based on the Dzyaloshinskii-Moriya interaction [29][30][31][32][33] ) or backscattering immune (caused by the intrinsic spin-wave mode chirality) spin-wave states is investigated. As it has been shown recently, magnetostatic surface waves (MSSW 34 ) feature such a backscattering immunity to surface defects due to the presence of energy gaps in the volume mode spectrum, rendering them insensitive to significant structural defects 35,36 . In addition, in nanometer thick films, MSSWs are known to provide a much larger group velocity in comparison to other spin-wave modes 28,37 , which renders these waves an interesting subject of investigation regarding a long-distance data transport in magnonic circuits.…”
mentioning
confidence: 99%